Which is to say, for starters, that the toddler/sex-toy sight gag is repeated ad nauseam. And from a Cosby joke uttered at a party where the punch has been spiked with the date-rape drug Rohypnol, to a casually(!) tossed-off joke(!) featuring the words “a Jew in the oven,” “Neighbors 2” takes adolescent glee in being offensive for offensiveness’ own curdled sake.

Returning are stars Zac Efron, Rose Byrne and Seth Rogen, who also co-wrote the script, along with four other credited writers. It took five writers to come up with this. The mind reels.

The original pitted the married-with-infant and coping-with-adulthood characters played by Rogen and Byrne against the noisy, wild, partying frat boys living next door, headed by Efron’s character.

For the sequel, the frat louts are gone, but a group of freshmen college girls — led by a character played by Chloë Grace Moretz — move into the now-vacant frat house with the intent of forming a party-hearty sorority. This brings them into conflict with the next-door parents. A war of mean-spirited pranks ensues.

The gender politics are very strange, as the young ladies want to be as crass as the guys — drink, drug, sex it up — because that is somehow perceived to be empowering.

The characters, without exception, are disagreeable idiots, shrilly performed.